Download Chapter 7 Cell Membrane structure notes 12.10

Cell Membrane Structure
Notes
Name _____________________
Date __________
Cell Membrane Structure:
1.
2.
3.
4.
5.
What is the purpose of the cell membrane? _________________________
What is another name for the cell membrane? _________________________________
Do animal cells have a cell membrane? _______________
What does homeostasis mean? _____________________________________________
How does the cell membrane maintain homeostasis?
___________________________________________________________________________
6. What are the 7 functions of the cell membrane?
a. _________________________________________
b. _________________________________________
c. __________________________________________
d. _________________________________________
e. _________________________________________
f. __________________________________________
g. ____________________________________________
7. What is the main component that makes up most of the cell membrane?
______________________________
8. What two parts make up a phospholipid? __________________ and _________________
9. The polar head of the phospholipid is made up of what?
__________________________________
10. The nonpolar tail of the phospholipid is made up of what?
______________________________
11. What are 3 other things that make up the cell membrane?
___________________________________________________________________
12. What is the difference in an INTEGRAL PROTEIN and a PERIPHERAL PROTEIN in a cell
membrane?
____________________________________________________________________
13. Why is the cell membrane also referred to as the “Fluid Mosaic Model?”
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
14. What is the difference in hydrophilic and hydrophobic?
_______________________________________________________________
15. What part of the phospholipid is hydrophilic? ___________________________________
16. What part is hydrophobic? _________________________________________________
17. What does it mean that the cell membrane is “Selective?”
______________________________________________________________________
18. How many layers of phospholipids make up the cell membrane? ______________________
19. Because of the 2 layers, what is it called? ___________________________________
20. Why type of molecules pass through the cell membrane easily?
_________________________
21. What type of molecules do NOT pass through the cell membrane easily?
________________________________________
Chapter 7 Cell Transport Notes
Name _____________________________
Date ________________
1. What are the 2 categories of cell transport? _________________________ and
___________________________
2. What does passive mean? __________________________________________
3. What does active transport mean? ______________________________________
4. What are the 3 types of passive transport? ___________________, ________________, and
________________________
5. What is the one type of cell transport that is under the category ACTIVE?
__________________________________
Diffusion
1. Is Diffusion passive or active? _________________
2. Does diffusion require energy to move things across the cell membrane?
___________________________________
3. How do molecules move by diffusion? ____________________________________________
4. When Molecules moving from a high concentration to a low concentration is called what?
_________________________________________________
5. Describe an example of diffusion.
______________________________________________________________________
6. Draw an arrow in the diffusion example below on which way the molecules will move.
Osmosis
7. Define Osmosis.
__________________________________________________________________________
8. In what direction does water move in osmosis?
_____________________________________________________________________
9. What are Aquaporins?
________________________________________________________________________
10. What does isotonic mean? _________________________________________________
11. If a cell is placed in an ISOTONIC solution, which way does water move? (into the cell or out of
the cell or both equally)?
______________________________________________________________
12. What does Hypotonic mean?
_____________________________________________________________________
13. If a cell is placed in a HYPOTONIC solution, which way does the water move?
______________________________________________
14. What does Hypertonic mean?
_______________________________________________________________________
15. If a cell is placed in a HYPERTONIC solution, which way does the water move?
____________________________________________
16. Label each cell below as hypertonic, hypotonic, or isotonic.
a. ________________
b. __________
c. _______________
17. What is the term used that means “cell bursting?”
____________________________________________________________
18. What is the term used that means “cell shrinking?”
_________________________________________________________________
Facilitated Diffusion
1. What does facilitate mean? __________________________________________
2. Is Facilitated Diffusion Active or Passive? ______________________________
3. Does facilitated diffusion need energy? _____________________
4. How do molecules move in facilitated diffusion? (up or down their concentration gradient)
________________________________________________
5. What does facilitated diffusion require to move things across the cell membrane?
__________________________________
6. What type of protein is in the cell membrane have a pore for materials to pass through?
_________________________
7. What type of protein changes shape and carries molecules across the cell membrane?
___________________________________
Active Transport
1. Is Active Transport active or passive? ________________________
2. Does active transport require energy to move things across the cell membrane?
_______________________________
3. What is the energy called that is needed by cells for active transport?
_____________________
4. How do molecules move in active transport? _______________________________
5. Do they move up or down their concentration gradient? ______________________________
6. What is an example of Active Transport?
______________________________________________________________
7. What does Exocytosis (Active Process) mean?
______________________________________________________________
8. What does Endocytosis mean?
___________________________________________________________________
9. What does Pinocyotosis mean?
_______________________________________________________________
10. What does Phagocytosis mean?
______________________________________________________________________